InChI=1S/C21H24O9/c1-8-6-11-12(9(2)7-28-11)13-10(8)4-5-21(3,18(13)25)30-20-16(24)14(22)15(23)17(29-20)19(26)27/h6-7,14-17,20,22-24H,4-5H2,1-3H3,(H,26,27)